Draft-producing device.



J. TROTTER.

DRAFT PRODUCING DEVICE.

APPLICATION mun rum, 1914.

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J. TROTTER.

DRAFT PRODUCING DEVICE.

APPLICATION IILIJD mum, 1914.

nuns rno'rrnn. or CHICAGO, rumors.

nnarcr-rnonucmq pn vrcn To all whom it may concern:

Be it known that I, JAMES Tnoi rnx, a citizen of the United States, resldmg at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Draft-Producmg Devices, of which the following is a spec1fication.

It is well known that the forced or artificial draft on the fire in locomotive engines, is created by the entrainment of the gases from the smoke box into the Smokestack, caused by the steam from the cyllnders, which is discharged through the smoke box and into the smoke stack. The extent or amount of entrainment depends, upon the velocity of the steam, the diameter of the steam column, and the length of such column, or the distance from the outlet orifice of the steam nozzle to the entrance to the stack. draft, it is necessary to vary the extent or amount of such entrainment, and this may be accomplished by controlling or varying the area of the circumference of the steam column, 'as well as the length of such column and the velocity. To provide means whereby such variations and control may be readily affected, from the cab of the engine, to produce a greater forced draft on the fire when necessary, or when the engine is under full working conditions, and to diminish such draft when a smaller amount of steam is necessary to be used in the cylinders, thereby preventing the danger of dragging upon or tearing up the fire in the fire box, is one of the objects of the present invention.

A further object is to provide an improved device of this character having means whereby a uniform draft may be obtained on the fire bed, resulting in a better combustion and a more even fire, and means where by such draft may be controlled or varied.

A further object is to provide an im-' proved device of this character which will be simple, durable, cheap and compact in construction, and effective and eflicient in operation.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, thecinvention consists in the features of novelty in substantially the construction, combination and arrange ment of the several parts, hereinafter more fully described and claimed, and shown in Specification of Letters Patent.

Application filed February 2, 1914,. Serial No. 815,883. a

In order therefore to control the Patented Sept. 19

the accompanying drawings illustrating the invention, and in which Figure 1 is a vertical longitudinal sectional view of the smoke box of a locomotive engine, havlng an attachment a plied thereto, constructed in accordance'w th the prin ciples' of this invention." Fig.2 is a detail sectional view taken on line 2-2, Fig. 1. Fig. 3 is a vertical sectional'v'iew taken on line 33, Fig. 1. Fig. 4 is a top plan view of the partsshown in Fig. 1.

Referring more particularly to the drawingsand in the preferred form of the invention, the numeral 10 designates generally the smoke box having a stack'll leading therefrom and flues 12 secured to the flue sheet 13, and which flues discharge into the smoke box.

Arranged adjacent the bottom of the smoke box is an exhaust pipe 14 to which is connected a nozzle 15, and which nozzle is arranged preferably at a low elevation and in alinement with the stack 11, so that the steam from the cylinders will be discharged through the exhaust pipe 14 and the nozzle 15, through the smoke box and into the stack 11. The discharging of this steam through the smoke box and into the stackcauses an entrainment of the gases in the smoke box and will draw the gases through the tubes 12 to create a draft upon the fire. I

Extending from a point above the fiues 12, downwardly and forwardly is an imperforate partition 16 which extends entirely across the smoke box. This partition has a portion 17 extending forwardly and between the smoke stack and nozzle 15, and terminates adjacent the front end of the smoke box. A screen or reticulated element 18 extends upwardly from the forward end of the portion 17 of the partition and terminatesad'ja'cent the top of the smoke box, and forms an apertured barrier for the cinders', 0! Spark 'arrester.

The nozzle 15 is provided with a tubular portion '19 which extends into an opening 20 inth eportion 17 of the partition, so as to prevent the cinders from bein forced into the smoke stack by the steam ischarged f-rom'the nozzle 15, which would be the case if the tubular extension 19 were not provided. I f

As soon as the steam leaves the nozzle 15 it' begins to expand and directly after it leaves the tubular extension 19 of the nozzle.

This expansion of the steam increases the diameter of the column of steam and'the amount of the entrainment of the gases in the smoke stack is controlled by the area of the circumference of the steam column, as well as the length of the column, or the distance between the discharge outlet of the tubular =portion"19 of the nozzle and the entrance to the stack. In order therefore, to vary the draft, and to create a stronger draft when the engine is under full working conditions, and to provide a means whereby the len th of the column of steam may be shortene and the area of the circumference of the column decreased so that there will not be such a strong draft on the fire under certain conditions, such as when starting from aterminal, and thereby prevent the fire from being torn up, there is provided means for controlling these .conditions. In the present exemplification of this invention it is accomplished by means of an adjustable 'extension for the nozzle 15, which embodies two telescoping sections 21, 22, the

section 21 telescoping with the section 19 andathe section 22 telescoping with the extension 21.

A cylindrical casing 23 is provided, which is held in position by means of a flan e 24 resting upon the portion 17 of the partltion,

and the lower end of this casing rests upon a flange 25 preferaby on the exhaust pipe 14, so that when the sections 21, 22 are telescoped, asshown in Fig. 1, they will stand within the casing 23 and their outlets will be substantially flush with the portion 17 of the partition. By extending these sections to the position shown in Fig. 3, it will be manifest that the-point-of discharge of the a steam from the nozzle and extensions, may be varied with respect to the entrance to the stack, and furthermore the column of steam will be held for a greater time against expansion, after it leaves the nozzle. There- .fore, by adjusting these sections to extend thenozzle, the amount of entrainment of the gases will be controlled, and the. draft regulated thereby. Any suitable means may be provided for adjusting and holding these sections in position. In the present form of 65 operate with the quadrant. Thus it will be.

the invention however, arms 25 are provided, and which arms are connected with the section-22, to extend preferably through suitable openings in the smoke ,boxwall, and each arm-is connected with a crank arm 26 on a rock shaft27, the latterbeing journaled in suitable bearings 28. Another arm 29 is connected with the rock shaft27 and this arm 29 is connected by means of a link 30 with an operating lever 31, the lattBI";b-. ing arranged within the cab of the engine. A toothed quadrant 32 may be provided. for holdingthe partsin their adjusted positions, and a locking dog 33 is also provided to comanifest that by rocking; the lever 31, the telescopin sections may be adjusted and they maybe held in their adjusted position so as to produce any extent of entrainment, at the will of the operator.

In order to insure a uniform and even draft over the entire fire bed, flues 34 are provided and these fiues extend through openings in the partition 16, adjacent the boiler lines 12, and project through the smoke box to the front end thereof and preferably through the screen 18, so that a draft will be created through the fines 34, by the steam discharged from the nozzle. One of these flues is shown as being located on opposite sides of the smoke box.

In order to control the draft through the lines 34, suitable dampers 35 are provided, which may be set at the will of the operator, and in any position. By the provision of these fines 34, a better combustion and a more even fire will be the result. Vith this improved construction it is also possible to provide a larger exhaust opening from the cylinders, which permits the steam to escape more readily and requiring less time, thereby reducing to a minimum the back pressure in the cylinder. By the provision of a large opening in the nozzle, the steam can be used more expansively by allowing the use of a Valve in the valve chest with lessdinside clearance than has heretofore been use Obviously with this improved construction the ad usting mechanism embodying the lever 31, the link 30, the rock shaft 27 and the links 25 may be omitted, in the event that it is desired to adjust the nozzle and maintain it in its adjusted position, and in lieu thereof, any mechanism may be provided and located entirely within the smoke box, for holding the extension of the nozzle in its adjusted position, while at the same time the adjustability of the nozzle extension will not be interfered with.

while in the present form of the invention the preferred form has been herein shown and described, it is to be understood that many changes may be made in the details of construction, and in the combination and arrangement- 0f the several parts without departing from the spirit of this invention, and it is therefore, desired that the drawings herewith submitted be considered as being merely diagrammatic.

What is claimed as new is:

-1. A device of the character described embodying a smoke box having flues dischargingthereinto, a stack leading from the box,

a nozzle arrangedat a low elevation in the lower portion of the box and in line with the stack to discharge. thereinto through the smoke box, an imperforate partition extending downwardly and. forwardly from a point abovethe fiues and adjacent the endsv of the flues, said partition having a portion extending forwardly between the nozzle and the stack and terminating short of the front of the box, a screen connected with the partition and extending upwardly to form an apertured barrier for the cinders to the stack, and an adjustable extension connected with and forming part of the nozzle.

2. A device of the character described embodying a smoke box having flues discharging thereinto, a stack leading from the box, a nozzle arranged at a low elevation in the lower portion of the box and in line with the stack to discharge thereinto through the smoke box, an imperforate partition extending downwardly and forwardly from a point above the flues and adjacent the ends of the fines, said partition having a portion extending forwardly between the nozzle and the stack and terminating short of the front of the box, a screen connected'with the partition and extending upwardly to form an apertured barrier for the cinders to the stack, an adjustable extension connected with and forming part of the nozzle, and means for controlling said extension at will.

3. A device of the character described embodying a smoke box having flues discharging thereinto, a stack leading from the box, a nozzle arranged at a low elevation in the lower portion of the box and in line with the stack to discharge thereinto through the smoke box, an imperforate partition extending downwardly and forwardly from a point above the flues and adjacent the ends of the flues, said partition having a portion extending forwardly between the nozzle and stack and terminating short of the front of the box, a screen connected with the partition and extending upwardly to form an apertured barrier for the cinders to the stack, an adjustable extension connected with and forming part of the nozzle, and means whereby said extension may be adjusted at will from the engine cab, and maintained in its adjusted position.

4. A device of the character described embodying a smoke box having fiues discharging thereinto, a stack leading from the box, a nozzle arranged at a low elevation in the lower portion of the box and in line with the stack to discharge thereinto through the smoke box, an imperforate partition extending downwardly and forwardly from a point above the fines and adjacent the ends of the flues, said partition having a portion extending forwardly between the nozzle and the stack and terminating short of the front of the box, a screen connected with the partition and extending upwardly to form an apertnred barrier for the cinders to the stack, and an adjustable extension connected with and forming part of the nozzle, said extension embodying one or more tubular elements telescoping with the nozzle.

5. A device of the character described, embodying a smoke box having flues discharging thereinto, an imperforate partition extending from a point above the fines downwardly and forwardly to the front of the box to divide the box into two chambers. said partition having a perforated portion adjacent the front of the box, a stack leading from one of the chambers, a steam nozzle arranged at a low elevation in the other chamber said, nozzle discharging through the other chamber and into the stack to entrain the gases from the box into the stack, and means constituting a portion of the nozzle whereby the extent of such entrainment may be controlled from the outside of the smoke box.

6. A device of the character described, embodying a smoke box having fiues discharging thereinto, an imperforate partition extending from a point-above the flues downwardly and forwardly to the front of the box to divide the box into two chal'nbers, said partition havin a perforated portion adjacent the front of the box, a stack leading from one of the chambers, a steam nozzle arranged at a low elevation in the otherchamber, said nozzle discharging through the other chamber and into the stack to entrain the gases from the box into the stack, and constituting a portion of the nozzle means for varying the point of discharge of the steam from the nozzle with respect to the entrance to the stack.

7. A device of the character described, embodying a smoke box having fiues discharging thereinto, an imperforate partition extending from a point above the flues downwardly and forwardly to the front of the box to divide the box into two chambers, said partition having a perforated portion adjacent the front of the box, a stack leading from one of the chambers, a steam nozzle arranged at a low elevation in the other chamber, said nozzle discharging through the other chamber and into the stack to entrain the gases from the box into the stack, means constituting a portion of the nozzle for varying the point of discharge of the steam from the nozzle with respect to the entrance to the stack, and means for controlling the last recited means from the outside of the smoke box.

8. A device of the character described, cmbodying a smoke box having flues discharging thereinto, an imperforate partition extending from a point above the fines downwardly and forwardly to the front of the box to divide the box into two chambers, said partition having a perforated portion adjacent the front of the box, a stack leading from one of the chambers, a steam nozzle arranged at a low elevation in the other chamber, said nozzle discharging through the other chamber and into the stack to entrain the gases from the box into the stack, and means whereby the extent'of such entrainment may be controlled from the outside of the, smoke box, the said means embodying an adjustable extension connected with and constituting a portion of the nozzle.

9. A device of the character described, embodying a smoke box havingflues discharging thereinto, an imperforate partition extending from a point above the fines downs wardly and forwardly to the front of the box to divide the box into two chambers, said partition having a perforated portion adjacent the front of the box, a stack leading from one of the chambers, a steam nozzle arranged at a low elevation in the other chamber, said nozzle discharging through the other chamber and into the stack to entrain the gases from the box into the stack, and means whereby the extent of such entrainment may be controlled from the outside of the smoke box, the said means embodying an adjustable extension for the nozzle comprising telescoping tubular sections connected with and constituting a portion of the nozzle.

10. A device of the character described,

I embodying a smokebox, a stack leading therefrom, a spark arrester within the box, a nozzle arranged at a low elevation and dis- 7 charging through the smoke box and spark arrester and into the stack to entrain the gases into the stack, and means connected with and constituting part of the nozzle for varying the point of discharge of the steam from the nozzle with respect to the entrance to the stack.

11. A device of the character described, embodying a smoke box, a stack leading therefrom, a spark arrester Within the box, a nozzle arranged at a low elevation and discharging through the smoke box and spark arrester and into the stack to entrain the gases into the stack, means connected with and constituting part of the nozzle for varying the point of discharge of the steam from the nozzle, with respect to the entrance to the stack and means for controlling the last said means at will and from the outside of the smoke box.

12. A device of the character described, embodying a smoke box, a stack leading therefrom, a spark arrester within the box and embodying a partition having imperforate and perforate portions, a nozzle arranged at a low elevation and discharging through said partition and into the stack to entrain the gases into the stack, and an adjustable extension embodying telescoping tubular sections connected with and constituting part of the nozzle for varying the point of discharge of the steam with respect to the entrance of the stack.

13. A device of the character described,-

embodying a smoke box, a stack leading therefrom, a spark arrester within the box and embodying a partition having imperaforate and perforate portions, a nozzle arranged at a low elevation and discharging,

through said partition and into the stack-t0 entrain the gases into the stack, an adjust-i able extension embodying telescoping tubu lar sections connected with and constituting part of the nozzle for varying the point ofv discharge of the steam with respect to the entrance of the stack, and means connected with the said extension and operable from the outside of the box for adjusting the said extension and for maintaining it in adjusted position.

14. A device of the character described, embodying a smoke box having flues discharging thereinto, a stack leading from the box, a nozzle arranged at a low elevation and in line with the stack, an imperforate partition extending downwardly and forwardly from a point above and adjacent the fiues, said partition having a portion extending forwardly between the nozzle and stack and terminating in' an apertured portion adjacent the front of the box, and provision whereby a draft may be created upon the flues through the downwardly extending portion of the partition.

15. A device of the character described, embodying a smokebo having fiues discharging thereinto, a stack leading from the box, a nozzle arrangedat a low elevation and in line with the stack, an imperforate partition extending downwardly and forwardly from a point above and adjacent the fines, said pa tition having a portion extending forwardly between the nozzle and stack and terminating in an apertured portion adjacent the front of the box, provision whereby a draft may be created upon the fiues through the downwardly extending portion of the partition, and means for controlling such draft.

16. A device of the character described, embodying a smoke box having flues discharging thereinto, a stack leading from the box, a nozzle arranged at a low elevation and in line with the stack, an imperforate partition extending downwardly and forwardly from a point above and adjacent the flues, said partition having a portion extending forwardly between the nozzle and stack and terminating in an apertured portion adjacent the front of the box,and a flue leading through the said downwardly extending portion of the partition and discharging into the smoke box.

17. A device of the character described, embodying a smoke box having flues discharging thereinto, a stack leading from the box, a nozzle arranged at a low elevation and in line with the stack, an imperforate partition extending downwardly and forwardly from a point above and adjacent the fiues, said partition having a portion extending forwardly between the nozzle and stack and terminating in an apertured ortion adjacent the front of the box, a ue leading through the said downwardly extending portion of the partition and discharging into 'the smoke box, and a damper in the flue.

- through the said downwardly extending portion of the partition and discharging into the forward portion of the smoke box through another portion of the partition, said fiues being arrangedon opposite sides of the stack and nozzle.

19. A device of the character described, embodying a smoke box having fiues discharging thereinto, a stack leading from the box, a nozzle arranged at a low elevation and in line with the stack, an imperforate partition extending downwardly and forwardly from a point above and adjacent the flues, said partition having a portion extending forwardly bctweenthe nozzle and stack and terminating in an apertured portion adjacent the front of the box, flues leading through the said downwardly extending portion of the partition and discharging into the forward portion of the smoke box through another portion of the partition, and a damper arranged in each of the flues.

20. A device of the character described, embodying a smoke box having fiues discharging thereinto, a partition extending downwardly and forwardly from a point above the flues and thence forwardly terminating in an apertured portion, a stack, a nozzle arranged at a low elevation and discharging into the stack and through the partltion, means connected with and constituting part of the nozzle for varying the point of discharge of the nozzle with respect to the entrance to the stack, and one or more fiues leading through the said partition adjacent the first said flues to the forward portion of the box.

21. A device of the character described,

embodying a smoke box having flues discharging thereinto, a partition extending downwardly and forwardly from a point above the fiues and thence forwardly terminating in an apertured portion, a stack, a nozzlearranged at a low elevation and discharging into the stack and through the partition, means connected with and constituting part. of the nozzle for varying the point of discharge of the nozzle with respect to the entrance to the stack, a flue leading through the partition adjacent the first recited fiues and discharging into the smoke box belowthe partition, and a damper for controlling the second recited flue.

22. A device of the character described, embodying a smoke box, a stack leading therefrom, a spark arrester within the box, a nozzle arranged at a low elevation and discharging through the smoke box and into the stack to entrain the gases into the stack, an adjustable extension connected with and constituting part of the nozzle, for varying/ the point of discharge of the steam from the nozzle with respect to the entrance to the stack, and means for holding the extension in its adjusted position with respect to the nozzle.

23. A device of the character described, embodying a smoke box having flues discharging thereinto, an imperforate partition extending from a point above the flues downwardly and forwardly to the front of the box to divide the box into two chambers, said partition havin a perforated portion adjacent the front 0 the box, a stack leading from one of the chambers, a steam nozzle arranged at a low elevation inthe other chamber, said nozzle discharging through the other chamber and into the stack to entrain the gases from the box into the stack, means embodying an adjustable extension connected with and constituting part of the nozzle, whereby, the extent of such entrainment may be varied, and means for holding the extension in its adjusted position.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 30th day of January A. D. 1914.

JAMES TROTTER.

Witnesses:

ALVIN W. Wxsn, J. H. JocH M, Jr. 

